Walls are a great hiding place for mice

Mice are excellent climbers and explorers.  Finding their way through the bones of houses like through mazes in a laboratory.  It is part of their nature to explore while searching for food, creating nests and communities inside our houses.   Mice can easily climb inside walls and get into ceilings, and floors.  They can chew through wood, plastic, plaster walls, sheet rock, drywall and pretty much any other building material other than glass, metal and concrete.  Well, if the concrete is not properly cured or is old and crumbly, they can even manage that.  Mice also have a good memory and leave scent trails to find their way around.